Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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ESTIMATION OF ABUNDANCE STABILITY OF LONG-TAILED TITS (AEGITHALOS CAUDATUS) IN CHUVASH REPUBLIC

Rakhcheeva M.V. 1
1 The State Biology Museum named after K.A. Timiryazev
The analysis of long-term dynamics of long-tailed tits abundance in Chuvash republic is given in the article. Data was collected in 1999-2010 in the biology station which is situated in the territory of Nature Park “Zavolzhye”. Birds were captured by the mist nets which were situated in the fixed locations and then marked with standard aluminum rings of RAS. We established that abundance of species has been fluctuating from year to year significantly in this territory, besides it strongly increased in the year of mass autumn migration of the species. Such surges of number of long-tailed tits occur in the spacious area and embrace not only region under this study but neighbouring territories. We also made a mathematical calculation of stability of species abundance in this territory. Our results showed that stability of abundance of long-tailed tits is changing from year after year too. This index is statistically positive depends on average minimum summer temperature and average maximum autumn temperature. In the years when stability of abundance has highest rate it was warmer in summer and autumn.